Interactive Brokers Group, Inc. (IBKR) · Insider trading

What Interactive Brokers Group's directors, officers and largest holders bought and sold themselves, from the Form 4 each of them files with the SEC within two business days of a trade. Open-market purchases and sales first: those are the trades somebody chose to make at the market price.

Bought, 12 months

$46,499

2 insiders, 10 trades

Sold, 12 months

$36.49M

2 insiders, 0% under a plan

Net, 12 months

−$36.45M

bought less sold

Latest filing

2026-10-05

filings read to 2026-10-19

Bought and sold at the market, by month

Two years. Purchases above the line, sales below, in dollars.

Bought Sold Largest month: $60.10M

Who traded, two years

Insider	Bought	Sold	Trades	Last trade	Holds after
Brody Paul JonathanDirector, Chief Financial Officer	–	$60.10M	34	2025-09-30	–
Nemser Earl HDirector, Vice Chairman	–	$57.19M	36	2026-01-27	–
Harris Lawrence EDirector	–	$5.77M	6	2026-04-28	173,482
Bright JillDirector	$56,014	–	2	2025-10-23	10,304
Conkling Lori ADirector	$20,119	–	9	2026-10-01	2,584

Open-market purchases and sales

Newest first. “Plan” marks a trade made under a 10b5-1 plan set up in advance.

Date	Insider	Trade	Shares	Price	Value	Holds after	Filing
2026-10-01	Conkling Lori ADirector	Buyplan	25	85.42	$2,136	2,584	Form 4
2026-09-01	Conkling Lori ADirector	Buyplan	25	94.53	$2,363	2,559	Form 4
2026-08-03	Conkling Lori ADirector	Buyplan	25	87.03	$2,176	2,534	Form 4
2026-07-01	Conkling Lori ADirector	Buyplan	25	88.03	$2,201	2,509	Form 4
2026-06-01	Conkling Lori ADirector	Buyplan	25	86.10	$2,152	2,484	Form 4
2026-05-01	Conkling Lori ADirector	Buyplan	25	79.64	$1,991	2,459	Form 4
2026-04-28	Harris Lawrence EDirector	Sale	26,000	76.93	$2.00M	173,482	Form 4
2026-04-01	Conkling Lori ADirector	Buyplan	25	68.38	$1,710	2,434	Form 4
2026-03-02	Conkling Lori ADirector	Buyplan	25	69.21	$1,730	2,409	Form 4
2026-02-25	Conkling Lori ADirector	Buyplan	50	73.21	$3,660	2,384	Form 4
2026-01-27	Nemser Earl HDirector, Vice Chairman	Saleindirect	39,731	75.07	$2.98M	20,469	Form 4
2026-01-27	Nemser Earl HDirector, Vice Chairman	Saleindirect	20,469	75.75	$1.55M	0	Form 4
2026-01-26	Nemser Earl HDirector, Vice Chairman	Saleindirect	60,882	75.83	$4.62M	94,118	Form 4
2026-01-26	Nemser Earl HDirector, Vice Chairman	Saleindirect	30,817	76.72	$2.36M	63,301	Form 4
2026-01-26	Nemser Earl HDirector, Vice Chairman	Saleindirect	3,101	77.98	$241,816	60,200	Form 4
2026-01-23	Nemser Earl HDirector, Vice Chairman	Saleindirect	84,935	77.65	$6.60M	215,065	Form 4
2026-01-23	Nemser Earl HDirector, Vice Chairman	Saleindirect	60,065	78.14	$4.69M	155,000	Form 4
2026-01-22	Nemser Earl HDirector, Vice Chairman	Saleindirect	100,000	76.81	$7.68M	300,000	Form 4
2025-10-29	Harris Lawrence EDirector	Sale	10,645	69.00	$734,505	198,704	Form 4
2025-10-28	Harris Lawrence EDirector	Sale	6,855	69.15	$474,023	209,349	Form 4
2025-10-27	Harris Lawrence EDirector	Sale	7,500	69.73	$522,975	216,204	Form 4
2025-10-24	Harris Lawrence EDirector	Sale	8,000	68.50	$548,000	223,704	Form 4
2025-10-23	Harris Lawrence EDirector	Sale	22,000	67.63	$1.49M	231,704	Form 4
2025-10-23	Bright JillDirector	Buy	400	65.95	$26,380	10,304	Form 4
2025-09-30	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	1,979	69.30	$137,145	8,083	Form 4
2025-09-30	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	1,155	70.00	$80,850	6,928	Form 4
2025-09-29	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	7,414	67.16	$497,924	20,875	Form 4
2025-09-29	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	8,792	68.27	$600,230	12,083	Form 4
2025-09-29	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	2,021	68.70	$138,843	10,062	Form 4
2025-09-26	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	15,477	65.74	$1.02M	29,870	Form 4
2025-09-26	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	1,581	66.15	$104,583	28,289	Form 4
2025-09-25	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	1,182	63.81	$75,423	58,461	Form 4
2025-09-25	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	8,866	64.76	$574,162	49,595	Form 4
2025-09-25	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	4,248	65.19	$276,927	45,347	Form 4
2025-09-24	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	13,464	64.76	$871,929	60,570	Form 4
2025-09-24	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	927	65.54	$60,756	59,643	Form 4
2025-09-23	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	6,227	64.90	$404,132	86,832	Form 4
2025-09-23	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	12,798	65.49	$838,141	74,034	Form 4
2025-09-22	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	14,639	63.94	$936,018	93,622	Form 4
2025-09-22	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	563	64.61	$36,375	93,059	Form 4

47 more

2025-09-19	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	6,928	64.66	$447,964	101,473	Form 4/A
2025-09-18	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	7,937	63.43	$503,444	267,878	Form 4
2025-09-18	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	37,905	64.40	$2.44M	229,973	Form 4
2025-09-18	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	71,019	65.05	$4.62M	158,954	Form 4
2025-09-17	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	61,794	62.06	$3.83M	320,542	Form 4
2025-09-17	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	44,727	62.48	$2.79M	275,815	Form 4
2025-09-16	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	98,601	62.24	$6.14M	382,923	Form 4
2025-09-16	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	587	62.62	$36,758	382,336	Form 4
2025-09-15	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	57,289	62.66	$3.59M	520,529	Form 4
2025-09-15	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	37,506	63.79	$2.39M	483,023	Form 4
2025-09-15	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	1,499	64.26	$96,326	481,524	Form 4
2025-09-12	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	35,592	63.84	$2.27M	639,435	Form 4
2025-09-12	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	61,617	64.19	$3.96M	577,818	Form 4
2025-09-11	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	57,851	62.94	$3.64M	729,750	Form 4
2025-09-11	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	54,723	63.54	$3.48M	675,027	Form 4
2025-09-10	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	104,906	62.51	$6.56M	787,601	Form 4
2025-09-09	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	22,537	61.30	$1.38M	977,463	Form 4
2025-09-09	Brody Paul JonathanDirector, Chief Financial Officer	Saleplanindirect	84,956	62.02	$5.27M	892,507	Form 4
2025-08-14	Nemser Earl HDirector, Vice Chairman	Saleplanindirect	33,379	63.86	$2.13M	420,521	Form 4
2025-08-14	Nemser Earl HDirector, Vice Chairman	Saleplanindirect	20,521	64.22	$1.32M	400,000	Form 4
2025-08-13	Nemser Earl HDirector, Vice Chairman	Saleplanindirect	4,600	63.75	$293,250	456,900	Form 4
2025-08-13	Nemser Earl HDirector, Vice Chairman	Saleplanindirect	200	64.19	$12,838	456,700	Form 4
2025-08-13	Nemser Earl HDirector, Vice Chairman	Saleplanindirect	200	66.09	$13,218	456,500	Form 4
2025-08-13	Nemser Earl HDirector, Vice Chairman	Saleplanindirect	2,400	66.77	$160,248	454,100	Form 4
2025-08-13	Nemser Earl HDirector, Vice Chairman	Saleplanindirect	200	67.20	$13,440	453,900	Form 4
2025-08-12	Nemser Earl HDirector, Vice Chairman	Saleplanindirect	153,000	67.39	$10.31M	502,586	Form 4
2025-08-12	Nemser Earl HDirector, Vice Chairman	Saleplanindirect	41,086	67.88	$2.79M	461,500	Form 4
2025-08-11	Nemser Earl HDirector, Vice Chairman	Saleplanindirect	12,841	66.09	$848,662	655,586	Form 4
2025-08-08	Nemser Earl HDirector, Vice Chairman	Saleplanindirect	10,200	65.60	$669,120	671,068	Form 4
2025-08-08	Nemser Earl HDirector, Vice Chairman	Saleplanindirect	2,641	65.94	$174,148	668,427	Form 4
2025-08-07	Nemser Earl HDirector, Vice Chairman	Saleplanindirect	12,400	63.94	$792,856	681,709	Form 4
2025-08-07	Nemser Earl HDirector, Vice Chairman	Saleplanindirect	441	64.35	$28,378	681,268	Form 4
2025-08-06	Nemser Earl HDirector, Vice Chairman	Saleplanindirect	12,641	63.47	$802,324	694,309	Form 4
2025-08-06	Nemser Earl HDirector, Vice Chairman	Saleplanindirect	200	64.16	$12,832	694,109	Form 4
2025-08-05	Nemser Earl HDirector, Vice Chairman	Saleplanindirect	11,041	63.64	$702,649	708,750	Form 4
2025-08-05	Nemser Earl HDirector, Vice Chairman	Saleplanindirect	1,800	64.84	$116,712	706,950	Form 4
2025-08-04	Nemser Earl HDirector, Vice Chairman	Saleplanindirect	12,841	64.54	$828,758	719,791	Form 4
2025-08-01	Nemser Earl HDirector, Vice Chairman	Saleplanindirect	1,200	62.79	$75,348	744,273	Form 4
2025-08-01	Nemser Earl HDirector, Vice Chairman	Saleplanindirect	7,441	63.94	$475,778	736,832	Form 4
2025-08-01	Nemser Earl HDirector, Vice Chairman	Saleplanindirect	3,200	64.71	$207,072	733,632	Form 4
2025-08-01	Nemser Earl HDirector, Vice Chairman	Saleplanindirect	1,000	65.66	$65,660	732,632	Form 4
2025-07-31	Nemser Earl HDirector, Vice Chairman	Saleplanindirect	12,441	66.18	$823,345	747,673	Form 4
2025-07-31	Nemser Earl HDirector, Vice Chairman	Saleplanindirect	2,200	66.71	$146,762	745,473	Form 4
2025-07-30	Nemser Earl HDirector, Vice Chairman	Saleplanindirect	32,386	66.32	$2.15M	367,514	Form 4
2025-07-30	Nemser Earl HDirector, Vice Chairman	Saleplanindirect	7,400	66.64	$493,136	360,114	Form 4
2025-07-28	Nemser Earl HDirector, Vice Chairman	Saleindirect	100	65.90	$6,590	399,900	Form 4
2025-01-31	Bright JillDirector	Buy	135	219.51	$29,634	2,476	Form 4

Grants, exercises and other transactions

Pay, tax and paperwork rather than a choice to trade at the market price. Two years.

42 × grant or award10 × shares withheld for tax5 × gift3 × other

Show them

Date	Insider	What	Shares	Price	Holds after	Filing
2026-07-31	Nemser Earl HDirector, Vice Chairman	Grant or award A	+803,568	87.99	803,568	Form 4
2026-05-08	Nemser Earl HDirector, Vice Chairman	Shares withheld for tax F	−22,486	84.42	429,344	Form 4
2026-05-08	Frank Thomas AjExecutive Vice President	Shares withheld for tax F	−31,730	84.42	251,518	Form 4
2026-05-08	Galik MilanDirector, Chief Executive Officer	Shares withheld for tax F	−255,039	84.42	3,215,389	Form 4
2026-05-08	Mendonca DenisChief Accounting Officer	Shares withheld for tax F	−11,157	84.42	145,071	Form 4
2026-05-08	Brody Paul JonathanDirector, Chief Financial Officer	Shares withheld for tax F	−82,920	84.42	2,856,806	Form 4
2026-01-01	Repetto Richard HDirector	Grant or award A	+389	64.31	3,046	Form 4
2026-01-01	Yuen NicoleDirector	Grant or award A	+389	64.31	10,126	Form 4
2026-01-01	Bright JillDirector	Grant or award A	+389	64.31	11,082	Form 4
2026-01-01	Conkling Lori ADirector	Grant or award A	+389	64.31	2,334	Form 4
2026-01-01	Harris Lawrence EDirector	Grant or award A	+389	64.31	199,482	Form 4
2026-01-01	Galik MilanDirector, Chief Executive Officer	Grant or award A	+389	64.31	3,470,428	Form 4
2026-01-01	Brody Paul JonathanDirector, Chief Financial Officer	Grant or award A	+389	64.31	2,939,726	Form 4
2026-01-01	Nemser Earl HDirector, Vice Chairman	Grant or award A	+389	64.31	451,830	Form 4
2026-01-01	Peterffy WilliamDirector	Grant or award A	+389	64.31	10,126	Form 4
2025-12-31	Conkling Lori ADirector	Grant or award A	+389	–	1,945	Form 4
2025-12-31	Peterffy WilliamDirector	Grant or award A	+389	64.31	9,737	Form 4
2025-12-31	Frank Thomas AjExecutive Vice President	Grant or award A	+13,944	–	283,248	Form 4
2025-12-31	Conkling Lori ADirector	Grant or award A	+1,167	–	1,167	Form 4
2025-12-31	Conkling Lori ADirector	Grant or award A	+389	64.31	1,556	Form 4
2025-12-31	Galik MilanDirector, Chief Executive Officer	Grant or award A	+224,650	–	3,469,650	Form 4
2025-12-31	Galik MilanDirector, Chief Executive Officer	Grant or award A	+389	64.31	3,470,039	Form 4
2025-12-31	Bright JillDirector	Grant or award A	+389	64.31	10,693	Form 4
2025-12-31	Harris Lawrence EDirector	Grant or award A	+389	64.31	199,093	Form 4
2025-12-31	Yuen NicoleDirector	Grant or award A	+389	64.31	9,737	Form 4
2025-12-31	Mendonca DenisChief Accounting Officer	Grant or award A	+11,156	–	156,228	Form 4
2025-12-31	Nemser Earl HDirector, Vice Chairman	Grant or award A	+23,240	–	451,052	Form 4
2025-12-31	Nemser Earl HDirector, Vice Chairman	Grant or award A	+389	64.31	451,441	Form 4
2025-12-31	Repetto Richard HDirector	Grant or award A	+389	64.31	2,657	Form 4
2025-12-31	Brody Paul JonathanDirector, Chief Financial Officer	Grant or award A	+53,452	–	2,938,948	Form 4
2025-12-31	Brody Paul JonathanDirector, Chief Financial Officer	Grant or award A	+389	64.31	2,939,337	Form 4
2025-12-29	Galik MilanDirector, Chief Executive Officer	Other J	−895,688	–	0	Form 4
2025-07-30	Nemser Earl HDirector, Vice Chairman	Grant or award A	+400,000	66.22	760,114	Form 4
2025-07-30	Brody Paul JonathanDirector, Chief Financial Officer	Grant or award A	+1,000,000	66.22	1,000,000	Form 4
2025-06-23	Nemser Earl HDirector, Vice Chairman	Gift G	−500	–	427,812	Form 4
2025-05-09	Nemser Earl HDirector, Vice Chairman	Shares withheld for tax F	−5,178	185.60	107,078	Form 4/A
2025-05-09	Galik MilanDirector, Chief Executive Officer	Shares withheld for tax F	−63,580	185.60	811,250	Form 4
2025-05-09	Frank Thomas AjExecutive Vice President	Shares withheld for tax F	−8,212	185.60	67,326	Form 4
2025-05-09	Mendonca DenisChief Accounting Officer	Shares withheld for tax F	−2,467	185.60	36,268	Form 4
2025-05-09	Brody Paul JonathanDirector, Chief Financial Officer	Shares withheld for tax F	−22,192	185.60	721,374	Form 4
2025-02-20	Peterffy ThomasDirector, Chairman	Gift G	−6,447	–	1,516,182	Form 4
2025-02-18	Peterffy ThomasDirector, Chairman	Gift G	−85,427	–	1,527,499	Form 4
2025-02-18	Peterffy ThomasDirector, Chairman	Gift G	−4,870	–	1,522,629	Form 4
2024-12-31	Mendonca DenisChief Accounting Officer	Grant or award A	+3,748	–	38,735	Form 4
2024-12-31	Brody Paul JonathanDirector, Chief Financial Officer	Grant or award A	+18,130	–	743,424	Form 4
2024-12-31	Brody Paul JonathanDirector, Chief Financial Officer	Grant or award A	+142	176.67	743,566	Form 4
2024-12-31	Bright JillDirector	Grant or award A	+142	176.67	2,341	Form 4
2024-12-31	Yuen NicoleDirector	Grant or award A	+142	176.67	2,337	Form 4
2024-12-31	Nemser Earl HDirector, Vice Chairman	Grant or award A	+7,763	–	112,114	Form 4
2024-12-31	Nemser Earl HDirector, Vice Chairman	Grant or award A	+142	176.67	112,256	Form 4
2024-12-31	Galik MilanDirector, Chief Executive Officer	Grant or award A	+69,305	–	874,688	Form 4
2024-12-31	Galik MilanDirector, Chief Executive Officer	Grant or award A	+142	176.67	874,830	Form 4
2024-12-31	Harris Lawrence EDirector	Grant or award A	+142	176.67	63,426	Form 4
2024-12-31	Repetto Richard HDirector	Grant or award A	+425	–	425	Form 4
2024-12-31	Repetto Richard HDirector	Grant or award A	+142	176.67	567	Form 4
2024-12-31	Frank Thomas AjExecutive Vice President	Grant or award A	+6,709	–	75,538	Form 4
2024-12-31	Peterffy WilliamDirector	Grant or award A	+142	176.67	2,337	Form 4
2024-12-31	Galik MilanDirector, Chief Executive Officer	Gift G	−223,922	–	805,383	Form 4
2024-11-27	Galik MilanDirector, Chief Executive Officer	Other J	−223,922	191.31	1,029,305	Form 4
2024-11-27	Galik MilanDirector, Chief Executive Officer	Other J	+223,922	191.31	223,922	Form 4

How to read it

Buy, sale: Code P and S on the form: shares bought or sold in the market, at the market price. The other codes are mostly pay (a grant, an option exercised) or tax (shares the company withheld), and say little about what the insider thinks of the price.
Plan: A sale or purchase under a Rule 10b5-1 plan, set up in advance and running on its own schedule. Since April 2023 the form has a box for it. Much executive selling is planned and says more about diversifying than about the company.
Holds after: The shares the insider still held after the trade, in the form the trade was in (directly, or indirectly through a trust or a fund).
Value: Shares times the price the form reports, which is often an average over several fills on the day.

Read from the SEC's own quarterly data sets of Forms 3, 4 and 5, and from each day's filings since the last one. A correcting amendment replaces the lines it restates. Every row links to its filing. None of this is advice: insiders sell for many reasons, and buy for fewer.

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